Comment No answer yet but you can hear a sample here (Score 3, Interesting) 54
I still can't find who the voice actress is, even following secondary links - however you are curious what the Sky voice sounds like you can listen to examples here
Scroll down, choose some text to read and then there is a dropdown for the voice as well.
I have to admit that does sound a LOT like Johansen, but I am puzzled why that's really an issue since they clearly have someone else actually doing the voice. Unless (conspiracy theory) there is no real voice actor and they had AI "make up" the voice and it decided to go with Johansen...